Hashtag gestural meme

OK, this is a current internet meme. My excuse is that it's a meta meme. Or at least it's about hashtags, twitter and social media. The blurb reads:

Jimmy Fallon & Justin Timberlake show you what a Twitter conversation sounds like in real life.

The video features a "gestural meme" that I hadn't seen before - the gesture for hashtags. Probably like a few other people who have watched this video, I might be using that one myself in the future.

The video has news coverage - here's CNET (Justin Timberlake and Jimmy Fallon mock #hashtagmania) and TheVerge (Watch this: Justin Timberlake and Jimmy Fallon show us what hashtag abuse really sounds like).